Improvement in machines for tacking boots and shoes



H; a; THOMPSON. Machines. fqr'l'acking Boots and Shoes Patented Sept.29,1874.

F5 6 RA!" I C CO. PHOTIFUTH. 39 8m PM VK PLACE, N-Y- UNITED STATESPATENT OFFICE.

HENRY Cr. THOMPSON, OF MILFORD, CONNECTICUT.

I IMPROVEMENT IN MACHINES FOR TACKING BOOTS AND SHOES.

Specification forming part of Letters Patent No. 155,554, datedSeptember 29, 1874; application filed August 31, 1874.

To all whom it may concern Be it known that I, HENRY G. THOMPSON, ofMilford, county of New Haven and State of Connecticut, have inventedcertain new and useful Improvements in Machines for Tacking Boots andShoes, of which the following is a specification:

My invention relates to that class of tackdriving machines in which thetacks are lifted and held by a reciprocating hammer while being driven;and the nature of my invention consists in providing the hammer with acentral hole or perforation for the purpose of exhausting theatmospheric air, and cause suction by which the tacks may be lifted andheld in position during the process of driving, as will be hereinaftermore fully set forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, whichforms a part of this specification, and in which- Figure 1 is a sideelevation of a tack-driving hammer embodying my invention, and Fig. 2 isa longitudinal section of the same.

The machines for which I have specially designed my invention are thosein which a magnetic hammer has been used to lift and hold the tackswhile being driven, the hammer operating intermittently up and down, asfully described in previous patents for tack-driving machines.

A represents such hammer, constructed substantially in the same manner,and operated the hammer while being driven by it into their places.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. In the process of driving tacks, the method of lifting and holdingthem by suction for the action of the driver, substantially asdescribed.

2. A tack-driving hammer, provided with a central hole or passage, andconnected with an exhaust-tube for the purpose of lifting and holdingthe tacks to be driven, substantially as herein set forth.

In testimony that I claim the foregoing as my invention I hereunto affixmy signature this 27th day of August, 1874.

HENRY e. TnoMPsoN.

- Witnesses:

FRANK L. ALLIs, HARRY GRANT THOMPSON.

